Car shuts off when A/C turned on... - Toyota Yaris Forums

Howster · 07-06-2013, 06:00 PM

Hey CTScott,

Some things happened I had not tried before so updating you to see what I can do next. First, I did notate all of the fields that my scanner can see, and I will list them when I get home. I checked for leaks by spraying throttle body cleaner at the intake and exhaust where I could, as well as any vacuum lines I could find. I didn't find anything.

I decided to give it WOT with the scanner connected and what happens is well, pretty much nothing. Well nothing in a good way. The engine really kind of bogs down and if I keep it down it will start to sputter and pop, like it is backfiring. I don't let it get loud, but I did notice the scanner is all over the place. Initial acceleration is hesitant, and then if I keep it down it bogs and sputters and misses. If I get it gradual throttle then it revs pretty much ok.

There is also the problem of the car not wanting to start. I end up spraying starting fluid in the intake and it starts right up. Once warm it seems to start ok. This to me points to a fuel pump as maybe it just isn't putting enough pressure to start it up initially. I don't know how to check the fuel pressure because there isn't a place to check it with a gauge. My scanner doesn't read fuel pressure I don't think..

My next step I guess is to take it to the Toyota dealership and have them check out the damn thing. I think I have exhusted all options unless I chage an O2 sensor or something like that. My scanner says they are good, but what does it know? Any tips from what I have told you here would be great. Thanks again.

Howster

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07-06-2013, 06:00 PM	#34
Howster Drives: 2007 Yaris 4-door Join Date: Jun 2013 Location: United States Posts: 18	Hey CTScott, Some things happened I had not tried before so updating you to see what I can do next. First, I did notate all of the fields that my scanner can see, and I will list them when I get home. I checked for leaks by spraying throttle body cleaner at the intake and exhaust where I could, as well as any vacuum lines I could find. I didn't find anything. I decided to give it WOT with the scanner connected and what happens is well, pretty much nothing. Well nothing in a good way. The engine really kind of bogs down and if I keep it down it will start to sputter and pop, like it is backfiring. I don't let it get loud, but I did notice the scanner is all over the place. Initial acceleration is hesitant, and then if I keep it down it bogs and sputters and misses. If I get it gradual throttle then it revs pretty much ok. There is also the problem of the car not wanting to start. I end up spraying starting fluid in the intake and it starts right up. Once warm it seems to start ok. This to me points to a fuel pump as maybe it just isn't putting enough pressure to start it up initially. I don't know how to check the fuel pressure because there isn't a place to check it with a gauge. My scanner doesn't read fuel pressure I don't think.. My next step I guess is to take it to the Toyota dealership and have them check out the damn thing. I think I have exhusted all options unless I chage an O2 sensor or something like that. My scanner says they are good, but what does it know? Any tips from what I have told you here would be great. Thanks again. Howster